Mother Maybelle Carter autoharp solo (live 1970)

Thank you, my friend CW5 Jack Cardwell for posting the music video of Mother Maybelle Carter performing an autoharp solo of "Black Mountain Rag" live on the Feb. 25, 1970 episode of "The Johnny Cash Show.
Johnny Cash introducing his mother-in-law " who began 43 years ago with her brother and sister in law The Carter Family.
Excellent music video.
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